src: make CGRP_RULE_MAXLINE include CG_OPTIONS_MAX

src: make CGRP_RULE_MAXLINE include CG_OPTIONS_MAX

CGRP_RULE_MAXLINE const, which is used as a length for buffer for
unparsed cgroup rules strings, doesn't include length of options
field (CG_OPTIONS_MAX). Therefore buffer length is not enough
to store all rule fields.

Commit is aimed to include CG_OPTIONS_MAX in CGRP_RULE_MAXLINE
to avoid potential problems with rules parsing.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[Kamalesh introduced tabs to align with macro continuation]
Signed-off-by: Mikhail Dmitrichenko <m.dmitrichenko222@gmail.com>
Acked-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>